We have that the density of the fluid is

From the question we are told that
object of volume 0.0004m^3
density 6000kg/m^3
fluid of density 5000kg/m^3.
Force F=0.7N
Generally the equation for the Force is mathematically given as

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A larger diameter wire has lower resistance. A lower resistance wire produces less heat for a given current flowing through it.
It rises because hot air is less dense than cool air.
organisms and water
Explanation:
Organisms and water contribute to both chemical and mechanical weathering . A form of weathering known as biological weathering is a derivative of both chemical and physical weathering.
- Weathering is the physical disintegration and chemical decomposition of rocks to form sediments and soils.
- Organisms are pivotal to both physical disintegration of rocks through their activities.
- Through their metabolic activities, they also releases chemicals that are used for chemical weathering of rocks.
Water is essential for weathering. It is used in alternate freezing and thawing, a mechanical weathering process to break down rocks.
It is used in rock hydrolysis for chemical weathering.
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Velocity adds direction to speed; it is the rate of travel in a particular direction. To calculate velocity, divide distance traveled by the time it took to travel that distance and add direction. If one's position does not change, velocity is zero.